Update installing additional extensions. (#843)
Update installing additional extensions. (#843)

The Widgets module is similar to VisualEditor in that it requires a `git submodule update --init` in the module's directory.
enterprisemediawiki/Meza1,enterprisemediawiki/Meza1,freephile/meza,enterprisemediawiki/meza,enterprisemediawiki/Meza1,enterprisemediawiki/meza,freephile/meza,freephile/qb,freephile/qb,freephile/meza,enterprisemediawiki/meza,freephile/meza,enterprisemediawiki/meza,freephile/qb